.selector property is removed

http://jquery.com/upgrade-guide/1.9/#selector-property-on-jquery-objects

As of 1.9, the .selector property is gone.
Looks like it is still hanging around in in ajaxForm.
Unless I am reading this wrong, .selector needs to be dealt with.

$.fn.ajaxForm = function(options) {
options = options || {};
options.delegation = options.delegation && $.isFunction($.fn.on);

// in jQuery 1.3+ we can fix mistakes with the ready state
if (!options.delegation && this.length === 0) {
    var o = { s: this.selector, c: this.context };
    if (!$.isReady && o.s) {
        log('DOM not ready, queuing ajaxForm');
        $(function() {
            $(o.s,o.c).ajaxForm(options);
        });
        return this;
    }
    // is your DOM ready?  http://docs.jquery.com/Tutorials:Introducing_$(document).ready()
    log('terminating; zero elements found by selector' + ($.isReady ? '' : ' (DOM not ready)'));
    return this;
}

if ( options.delegation ) {
    $(document)
        .off('submit.form-plugin', this.selector, doAjaxSubmit)
        .off('click.form-plugin', this.selector, captureSubmittingElement)
        .on('submit.form-plugin', this.selector, options, doAjaxSubmit)
        .on('click.form-plugin', this.selector, options, captureSubmittingElement);
    return this;
}

return this.ajaxFormUnbind()
    .bind('submit.form-plugin', options, doAjaxSubmit)
    .bind('click.form-plugin', options, captureSubmittingElement);

};

Start at the $.fn.ajaxForm entry point shown in the issue and read the jQuery 1.9 upgrade-guide section on the removed .selector property. Trace both the zero-element ready-state path and the delegation event bindings. Done means ajaxForm no longer depends on .selector while preserving the reported behavior, with the relevant existing tests or examples passing.